远端由单片机通过RS232串行口控制调制解调器，本地主机由系统机和调制解调器组组成。
In the remote, the microcontroller through RS232 serial interface controls MODEM, and the local main computer is made up of system computer and MODEM.
远端由单片机通过RS232串行口控制调制解调器，本地主机由系统机和调制解调器组组成。
In the remote, the microcontroller through RS232 serial interface controls MODEM, and the local main computer is made up of system computer and MODEM.
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